The San Tan Tactical STT-15 (Pillar Series) is a premium, high-performance semi-automatic modern sporting rifle designed from the ground up for absolute reliability, smooth cycling, and heavy-duty field use. Chambered in the versatile 5.56x45mm NATO cartridge, this tactical platform features a 10.5-inch match-grade barrel optimized for maneuverability in close-quarters environments. At its core is San Tan’s flagship Pillar billet receiver set, precision CNC-machined from 7075-T6 aerospace-grade aluminum and finished in a durable Olive Drab Green (ODG) anodizing. Outfitted with a premium CMC flat-face 3.5 lb drop-in trigger for a crisp, clean break, an LTT suppressor-optimized enhanced bolt carrier group, and a fully ambidextrous manual of arms, this rifle offers elite ergonomics and rapid shot-to-shot recovery.

• Manufacturer: San Tan Tactical
• Model: STT-15 AR Pistol / Short Rifle Layout (Pillar Series)
• Caliber/Gauge: 5.56x45mm NATO (Accepts .223 Remington)
• Capacity: 30+1 Rounds
• Barrel Length: 10.50"
• Barrel Material: High-Grade Performance Steel
• Receiver Set: Pillar Billet 7075-T6 Aerospace Aluminum (True Ambidextrous)
• Finish Color: Olive Drab Green (ODG) Anodized
• Trigger: CMC Flat-Face 3.5 lbs Single-Stage Drop-In Trigger
• Bolt Carrier Group: STT Suppressor-Optimized Enhanced BCG
• Furniture: Premium Magpul Carbine Grip & Component Additions
• Action: Direct Impingement Semi-Automatic
• Hand: Fully Ambidextrous (Mag Release, Bolt Catch, and Safety)
• Weight: 9.53 lbs (Total Packaged Weight)
• Unique Features: Hand-finished billet receiver aesthetics, oversized integrated winter trigger guard, flared magazine well for high-speed reloads, specialized gas-mitigating suppressor design
• What's In The Box: Firearm, (1) 30-Round Magpul PMAG, Cable Lock, Owner's Manual